Darwin pondered which of the following questions
most heavily after his return to England?
a. What could explain the great numbers of
species?
b. Does fossil evidence support the theory of
uniformity?
c. Are the extinct and living armadillos the same
species?
d. Did Galápagos finches have a common mainland
ancestor?
e. Will natural selection work in England?
Answer: a
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What was the long-term effect of the introduction of myxoma virus to control rabbits in Australia?
a. The rabbits were all killed. b. Most rabbits became immune to the virus. c. The virus killed off some of the rabbit population but also infected kangaroos and wallabies. d. The virus became less virulent and the rabbits gained some immunity. e. The virus had no effect.
Which of the following is NOT a component of DNA?
a. deoxyribose b. phosphate c. adenine d. uracil e. guanine
What is the type of bond between ions in salt?
A) ionic bond B) covalent bond C) hydrogen bond
The body region where a ciliary escalator helps to sweep microbes trapped in mucus away from that body site is the
A. respiratory tract. B. skin. C. digestive tract. D. urinary tract. E. eyes.